PASCO OS-9179 User Manual

$.50

Instruction Sheet for the PASCO
Models OS-9165 and OS-9179

Diffraction Slit Sets

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The PASCO Model OS-9165 includes four slides:

Set 1: Four single slits.
Set 2: Four double slits.
Set 3: Four multiple slits.
Set 4: Aperture and diffraction patterns.

The PASCO Model OS-9179 includes two slides:

Set 1: Four single slits.
Set 2: Four double slits.

Electroformed Slits

Specifications:

Material: .005 mm electroformed nickel
Tolerances: +/- .005 mm
Slit Width and Spacing:

The label on the top of each slide lists four patterns: A,
B, C, and D. The slits are arranged in that order from
left to right on the slide. Figure 1 illustrates the relation­ship between the label and the slit specifications.

Note: The 'SLIT SPACE' dimension is from center
to center of each slit

PATTERN A B C D
NO. SLITS 2222
SLIT WIDTH .04 .04 .08 .08
SLIT SPACE .250 .500 .250 .500

A B C D

FIGURE 1

Example for Double Slit Slide:
Pattern 'A' (furthest on the left) consists of two slits,

each .04 mm wide and spaced .250 mm apart, center to
center.

Pattern 'B' (second from the left) consists of two slits,
each .04 mm wide and spaced .500 mm apart, center to
center.

In Pattern 'C' and 'D' the width of each slit is .08 mm, while
the center to center spacing is the same as for 'A' and 'B'.

PASCO

10101 Foothills Blvd. • P. O. Box 619011 • Roseville, CA 95661 USA
Phone [phone] • FAX [phone] • TWX 910-383-2040

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APERTURES AND DIFFRACTION

X
Y

XY

PATTERNS

Specifications:

Material: .005 mm electroformed nickel
Tolerances: +/- .005 mm
Pattern Dimensions:
Figure 2 illustrates the relationship between the slide label

and the aperture or diffraction pattern dimensions. Enlarge­ments of patterns 'C' and 'D' are also represented.

PATTERN A B C D
NO. SLITS 2222
SLIT WIDTH .04 .04 .04 .04
SLIT SPACE .250 .500 .250 .500

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A B C D

FIGURE 1

Aperture 'A' (furthest on the left) is circular in shape with a
.04 mm diameter.
Aperture 'A' (second to the left) is circular in shape with a
.08 mm diameter.

X

Y

X
Y

Pattern 'D'

Note: The black areas in Pattern 'C' and 'D' repre­sent the actual hole-pattern

Dimensions for both Pattern 'C' and 'D':

x = .025 mm
y = .075 mm

Operating Instructions

Place the steel pads of any slide against the magnetic surface
of the component holder and move the slide until the desired
slits are in the proper position.

Note: It may be necessary to use an Aperture Mask
(such as PASCO Model OS-9139) on the opposite
side of the component holder to insure that light is
incident on only one pattern at any given time.

Pattern 'C'

X

Y

2

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